statement 1: Plane angle is a dimensionless quantity.
statement 2: All supplementary quantities are dimensionless.

statement 1 and statement 2 are correct and statement 2 is correct explanation of statement 1

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statement 1 and statement 2 are correct and statement 2 is not the correct explanation of statement 1

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statement 1 is true and statement 2 is false

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statement 1 is false and statement 2 is true

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Solution

The correct option is C statement 1 and statement 2 are correct and statement 2 is not the correct explanation of statement 1
Plane angle has radian as units. but these do not come under SI or derived units.

Units other than SI units or derived units are called supplementary units.
Since they have no units under SI system, they can be considered dimensionless. Reason is correct.

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